'Separated' in the Bible

Brothers, although we have been separated from you for a little while in person but not in heart we eagerly desire to see you again face to face.

For this is the will of God, that you be sanctified [separated and set apart from sin]: that you abstain and back away from sexual immorality;

that each of you know how to control his own body in holiness and honor [being available for God’s purpose and separated from things profane],